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Teaching Rounding
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Videos
A great little video with adults showing
real life examples of when they use rounding
Khan Academy
Rounding Whole Numbers series
Web games
Here are some online games to practice rounding:
Mathnook
Math Balloons Rounding
(rounds to 10, a Tetris like game with balloon popping)
Mathszone scaffolded
rounding to 10
using a number line, and
rounding to 100
WMNet
Postbox HTU rounding to 100
and other games (I am not sure that the <, > one actually works)
Glowia's Estimation Contraption
- round numbers to perform quick estimates of addition
Rounding dartboards
- not really a game, shows numbers rounded to various levels
IceIceMaybe
from MangaHigh - Very cute noisy game where you save jumping penguins by rounding simple calculations to make icebergs
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Videos
Web games
Here are some online games to practice rounding: